Radio communication system

a radio communication and system technology, applied in the field of radio communication systems, can solve the problems of affecting the quality of optical signals, the inability to separate signals to be received and noise from each other, and the inability to prevent optical signal deterioration, so as to prevent the quality deterioration of optical signals
US20050266797A1Inactive Publication Date: 2005-12-01PANASONIC CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
PANASONIC CORP
Publication Date
2005-12-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is directed to a wireless communication system capable of keeping a level of a wireless signal received by a relay apparatus (20) within a predetermined dynamic range. In a control apparatus (10), a transmitting section (102) converts a downstream electric signal into a downstream optical signal and transmits the downstream optical signal to the relay apparatus (20) via an optical transmission path (40). The relay apparatus (20) converts the received downstream optical signal into a downstream electric signal and transmits the downstream electric signal as a wireless signal to a wireless communication terminal (30) from a transmitting / receiving antenna section (204). In the relay apparatus (20), a level adjustment section (207) adjusts the level of the wireless signal transmitted by the relay apparatus (20) such that the receiving level of the wireless signal received by the relay apparatus is kept within a predetermined range.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a system in which a control apparatus communicates with a wireless communication terminal via a relay apparatus, and more particularly to a system in which the control apparatus and the relay apparatus are connected to each other via an optical transmission path. BACKGROUND ART

[0002] Recently, wireless communication systems in which a relay station for communicating with a wireless communication terminal wirelessly is connected to a control apparatus via an optical transmission path have been used (for example, Japanese Laid-Open Patent Publication No. 9-233050).

[0003] FIG. 43 is a diagram showing a structure of a conventional wireless communication system described in Japanese Laid-Open Publication No. 9-233050. In the wireless communication system shown in FIG. 43, a control apparatus 19 converts a modulated signal into an optical signal and transmits the optical signal to the relay apparatus 29 via an optical transmission p...

Claims

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